JP2007017145A - Heat insulting structure for cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress aged deterioration of a heat insulating material. <P>SOLUTION: A sealant 44 with low water vapor permeability is applied to the inner surface side of one joint 35B of an outer box 31, and the sealant 44 is applied to the other joint 35A after foaming and filling the heat insulating material 33. As to joints 36A, 36B of an inner box 32, a clearance is formed between flanges, and both flanges are connected by a fastener with a circular hole 55 opened. The circular hole 55 is closed with a tape 56 with high air permeability to provide an opening 37 through which water vapor can pass. When water vapor outside a storage is going to move into the storage through a heat insulated box body 30, since the joints 35A, 35B of the outer box 31 are closed with the sealant 44, infiltration of water vapor into the heat insulating material 33 is suppressed. Even if the water vapor infiltrates, it moves into the storage from openings 37 of the joints 36A, 36B of the inner box 32. Retention of water vapor in the heat insulating material 33 and furthermore the dew condensation or freezing of the water vapor are suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat insulating structure used for a cooling storage such as a heat insulating box, a heat insulating door, and a heat insulating partition member.

The main body of the cooling storage is generally formed by a heat insulating box body in which an outer box and an inner box are arranged with a space between them, and a heat insulating material made of foamed resin such as polyurethane foam is foam-filled between the two boxes. (For example, refer to Patent Document 1).
When a specific example is shown by FIG. 10, the outer box 1 is formed by connecting a plurality of panels 2 made of galvanized steel plates, and the inner box 3 is formed by connecting a plurality of panels 4 made of stainless steel plates. Here, the joint on the side of the outer box 1 connects the flanges 2A at the edge of the panel 2 with rivets, but a portion where the paper tape 6 is pasted on the inside to prevent the heat insulating material 5 from leaking (see FIG. And a portion sandwiching a gas-permeable sealing material such as sponge 7 (upper side in the figure). On the other hand, the joint on the inner box 3 side is sandwiched between synthetic resin fasteners 8 (clips), both for preventing leakage of the heat insulating material 5 and fixing the flanges 4A.
Japanese Patent Laid-Open No. 8-100978

By the way, in the cooling storage cabinet provided with the main body formed as described above, particularly when the water vapor partial pressure difference inside and outside the cabinet is large, or the door is frequently opened and closed, or the heat cycle (cooling operation and defrosting operation). When the atmospheric pressure in the cabinet changes greatly due to the above, the seam on the outer box 1 side is closed with a sponge 7 or a paper tape 6 having a high water vapor transmission rate, so that water vapor enters and fills relatively easily. It penetrates the heat insulating material 5 (polyurethane foam) and tries to move into the warehouse. However, since the seam of the inner box 3 is blocked by the fastener 8 having a low water vapor transmission rate, the water vapor stays in the heat insulating material 5. When the temperature is equal to or lower than the dew point temperature, as shown by the symbol x in FIG.
The present invention has been completed based on the above circumstances, and an object thereof is to suppress aged deterioration of the heat insulating material.

  As means for achieving the above-mentioned object, the invention of claim 1 is such that a heat insulating material made of foamed resin is foam-filled in the outer shell, and is interposed between two spaces having different temperature ranges. In the heat insulating structure of the cooling storage, the gap existing on the surface of the outer shell facing the relatively high temperature space is closed with a sealing material having a low water vapor transmission rate. Have.

The invention of claim 2 is characterized in that, in the invention according to claim 1, an opening is provided on a surface of the outer shell facing the relatively low temperature space.
According to a third aspect of the present invention, in the one according to the second aspect, the surface on the side facing the relatively low-temperature space is formed by joining a plurality of plate materials, and the facing surfaces of the two plate materials facing each other The opening is formed by a gap formed between the two.
According to a fourth aspect of the present invention, in the method according to the third aspect, a protrusion is formed on one of the mating surfaces opposed to each other, and the protrusion is applied to the other mating surface to connect the mating surfaces to each other. It is characterized by

According to a fifth aspect of the present invention, in the heat insulating structure according to any one of the first to fourth aspects, the exterior member facing the exterior and the interior member facing the interior are spaced apart. The heat insulating material is formed by foam filling in the outer shell disposed, and the interior member is disposed on the surface of the outer shell facing the relatively high temperature space. It is characterized in that each of the surfaces of the outer shell facing the relatively low temperature space is formed.
According to a sixth aspect of the present invention, in the thermal insulation structure according to the fifth aspect, the outer box and the inner box are arranged with a space therebetween, and the heat insulating material is foam-filled between the two boxes. It is the formed heat insulation box, Comprising: It has the characteristics in which the said outer box comprises the said exterior member, and the said inner box comprises the said interior member, respectively.

According to a seventh aspect of the invention, there is provided the heat insulating structure according to the fifth aspect, wherein the heat insulating structure connects the exterior plate and the interior plate provided with a packing mounting portion at the peripheral edge with an interval between the plates. A heat insulating door formed by foaming and filling a heat insulating material, wherein the exterior member is a portion inside the packing mounting portion in the interior plate by the portion outside the packing mounting portion in the exterior plate and the interior plate. The interior members are respectively configured by the above, and the joint between the exterior plate and the interior plate is a portion constituting a gap in the exterior member.
The invention according to claim 8 is the apparatus according to any one of claims 1 to 4, wherein the heat insulating structure is a partition member in which the heat insulating material is foam-filled in an outer shell, It is characterized in that storage chambers having different cooling temperature ranges are formed on both sides of the partition member by being mounted on.

<Invention of Claim 1>
When the water vapor partial pressure difference between the two spaces is large, or when the atmospheric pressure in the relatively low temperature space changes significantly, the water vapor in the relatively high temperature side moves toward the low temperature side space through the heat insulation structure. The gap on the surface facing the relatively high temperature space in the outer shell is closed with a sealing material having a low water vapor transmission rate, so the surface facing the same high temperature space Intrusion of water vapor from the gap is prevented. For this reason, it is possible to prevent water vapor from staying in the heat insulating material, and thus to prevent condensation or icing, and to prevent performance deterioration of the heat insulating material over a long period of time.

<Invention of Claim 2>
Even if air (water vapor) stays in the heat insulating material during foam filling of the heat insulating material, or the gap on the side facing the relatively high temperature space is closed with a sealing material with low water vapor permeability However, it is unavoidable that water vapor may inevitably enter and stay in the heat insulating material, leading to condensation and icing.
In that respect, in the present invention, since the opening is provided on the surface facing the relatively low-temperature space, the water vapor in the heat insulating material moves to the relatively low-temperature space through the opening, It is possible to prevent water vapor from staying in the heat insulating material, and thus dew condensation and icing.
Also, if there is an opening on the surface facing the low-temperature space, the air on the low-temperature space side penetrates into the heat insulating material through the opening, but stays in the heat insulating material at a low temperature and low humidity. In order to do so, no condensation occurs.

<Invention of Claim 3>
When the surface on the side facing the relatively low temperature space is formed by connecting a plurality of plate materials, a gap that is unexpectedly formed between the facing surfaces of both plate materials, or intentionally provided An opening is formed by the gap formed.
<Invention of Claim 4>
By changing the height of the protrusion, the opening amount of the opening can be easily controlled.

<Invention of Claim 5>
When there is a large difference in the water vapor partial pressure inside or outside the chamber, or when the atmospheric pressure inside the chamber changes significantly, the water vapor outside the chamber will move toward the interior through the heat insulation structure. Is closed with a sealing material having a low water vapor transmission rate, so that the water vapor itself is prevented from entering through the gap between the exterior members. For this reason, it is possible to prevent water vapor from staying in the heat insulating material, and thus to prevent condensation or icing, and to prevent performance deterioration of the heat insulating material over a long period of time.
<Invention of Claim 6>
It can be applied to a heat insulating box constituting the main body of the cooling storage.
<Invention of Claim 7>
It can be applied to a heat insulating door equipped in a cooling storage.

<Invention of Claim 8>
If the water vapor partial pressure difference between the two storage chambers is large, or if the air pressure in the storage chamber on the relatively lower cooling temperature range changes significantly, the water vapor in the storage chamber on the relatively higher cooling temperature region Although it tries to move toward the storage chamber on the relatively low side through the partition member, the gap existing on the surface side facing the storage chamber having a high cooling temperature range is closed with a sealing material having a low water vapor transmission rate. The water vapor itself is prevented from entering through the gap on the same surface. For this reason, it is possible to prevent water vapor from staying in the heat insulating material, and thus to prevent condensation or icing, and to prevent performance deterioration of the heat insulating material over a long period of time.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to FIGS. In this embodiment, horizontal cooling storages, such as a refrigerator and a freezer, are illustrated. As shown in FIGS. 1 and 2, the horizontal cooling storage is provided with a storage box body 10 having a horizontally long box shape opened on the front surface, the inside of which is a storage chamber 11, and viewed from the front of the storage box body 10. In the upper position of the left side surface, a cooler chamber 12 is extended and formed in communication with the storage chamber 11. The storage body 10 and the cooler chamber 12 are integrally formed by a heat insulating box 30 which will be described later in detail.
The storage body 10 is supported by legs 14 provided at the four corners of the bottom surface, and a partition member (not shown) is disposed at the center in the width direction at the front opening, and two left and right entrances 15 (see FIG. 5), and a heat insulating door 60 is attached to each doorway 15 in a double-spreading manner.

A machine room 16 is provided on the left side surface of the storage body 10, and the cooling unit 20 is housed in the machine room 16 so that it can be pulled out. The cooler chamber 12 having a (not shown) is disposed, and a storage space 17 is secured on the lower side.
The cooling unit 20 is unitized by stacking a cooler 24 and an internal fan 25 on a top surface of a refrigeration apparatus including a compressor 21, a condenser 22, and the like via a heat-insulating cooler chamber lid. When inserted from the front of 16, the refrigeration apparatus is stored in the storage space 17, the cooler 24 and the internal fan 25 are stored in the cooler chamber 12, and the inlet / outlet is closed with the cooler chamber lid. Is done.
When the refrigeration apparatus (compressor 21) and the internal fan 25 are driven during the cooling operation, the air in the storage chamber 11 is provided on the lower side of the cooler 24 as shown by the arrow in FIG. After being sucked in through the suction port 26 and circulated through the cooler 24 and converted into cold air, it is circulated and supplied so as to be blown out from the blowout port 27 to the ceiling surface side of the storage chamber 11. Is supposed to be cooled.

Then, the heat insulation box 30 which comprises said storage main body 10 and the cooler chamber 12 is demonstrated. The heat insulating box 30 is formed by arranging an outer box 31 made of, for example, a galvanized steel plate and an inner box 32 made of, for example, a stainless steel plate with a space therebetween, and is made of a foamed resin such as polyurethane foam between the boxes 31 and 32. The heat insulating material 33 is formed by foam filling.
The outer box 31 is formed in a box shape having a plurality of panels connected to each other and generally opened to the front. On the other hand, the inner box 32 is formed in a box shape with a front opening that is slightly smaller than the outer box 31 by connecting a plurality of panels.

Next, the structure of the seam in the outer box 31 and the inner box 32 will be described with reference to FIG. 3 taking the right side wall portion of the storage body 10 as an example.
First, on the inner box 32 side, the bottom plate 51 is formed in a shallow dish shape, and the right edge of the top plate 50 and the right edge of the bottom plate 51 are joined to the upper and lower edges of the right side plate 52, respectively. A seam 36A and a lower seam 36B. Therefore, a flange 50A is formed on the right side edge of the top plate 50 so as to be flush with the plate surface, and a flange 51A which is bent outward at a right angle is formed on the right side edge of the bottom plate 51. On the other hand, on both upper and lower edges of the right side plate 52, flanges 52A that are bent outward at right angles are formed.

  In the upper joint 36A, the flange 50A of the top plate 50 and the upper edge flange 52A of the right side plate 52 are formed. In the lower joint 36B, the flange 52A of the lower edge of the right side plate 52 and the flange of the bottom plate 51 are formed. 51A are respectively stacked one above the other and are elastically sandwiched and fixed by fasteners 54 made of synthetic resin that are clipped together. However, round holes 55 having a diameter of about the thickness of two flanges 50A (51A, 52A) are formed in the substrate portion of the fastener 54 at an appropriate interval in the length direction. On the outer surface side of the round hole 55, a tape 56 having good air permeability is attached. As this tape 56, a nonwoven fabric, a surgical (twill) tape, a Japanese paper tape, etc. are mentioned. The tape 56 is applied to prevent the heat insulating material 33 (polyurethane foam) from leaking. If the leakage is not recognized, the tape 56 may not be applied. Other seams in the inner box 32 are also fixed by the same structure as described above.

With respect to the inner box 32 assembled as described above, a panel constituting the outer box 31 is joined to the outer side of the inner box 32 while being assembled at a predetermined interval.
In the right side wall portion of the storage body 10, the right edge of the top plate 40 and the right edge of the bottom plate 41 are joined to the upper and lower edges of the right side plate 42, respectively, and the upper joint 35 </ b> A and the lower joint are aligned. Eye 35B. Therefore, a flange 41A bent at right angle upward is formed at the right edge of the bottom plate 41, and a flange 42A bent at right angle inward is formed at the lower edge of the right side plate 42. Overlaid in the lower corners of the face plate 42, rivets are driven and joined at appropriate intervals. A sealing material 44 (tape or seal) having a low water vapor transmission rate is applied to the inner surface side of the joint 35B.

Further, at the upper joint 35A, the flange 40A of the top plate 40 and the flange 42A at the upper edge of the right side plate 42 are overlapped with a sponge tape 45 having good air permeability, and rivets are driven in at appropriate intervals and coupled. Has been.
In the other seam in the outer box 31, a sealing material 44 having a low water vapor transmission rate is applied to the inner surface side like the lower seam 35B, or the air vent like the upper seam 35A. The structure is such that a good sponge tape 45 is sandwiched therebetween.

As described above, when the outer box 31 is assembled to the outside of the inner box 32 with a gap, a synthetic resin decorative frame (not shown) called a joint is attached between the opening edges of both the boxes 31 and 32. Thus, the outer shell referred to in the present invention is constituted. This outer shell is set in a foaming jig, and a liquid heat insulating material 33 (polyurethane foam) is placed between the boxes 31 and 32 from an inlet (not shown) opened at an appropriate location of the outer box 31. It is injected into the filling space and foamed and solidified, so that the heat insulating material 33 is filled. The degassing at the time of foaming is performed mainly through the sponge tape 45 disposed on the upper joint 35A or the like.
When the foam filling of the heat insulating material 33 is completed in this way, a sealing material 44 (tape or seal) having a low water vapor transmission rate is applied to the outer surface side of the joint 35A where the sponge tape 45 is interposed. Closed. The inlet of the liquid heat insulating material 33 is also closed with a sealing material 44 having a low water vapor transmission rate. Thereby, manufacture of the heat insulation box 30 is completed.

  The storage body 10 and the cooler chamber 12 are formed by the heat insulation box 30 described above, but this heat insulation box 30 is simply a sealing material in which the joints 35A and 35B of the outer box 31 have a low water vapor transmission rate. It is closed at 44. On the other hand, for the joints 36A and 36B of the inner box 32, the flanges 50A and 52A or the flanges 52A and 51A are joined by the fastener 54, but receive the foaming pressure when the heat insulating material 33 is foamed. Although there is no problem as a product, a slight gap is inevitably formed between the flanges 50A, 52A or between the flanges 52A, 51A, and the product is slightly deformed such as undulating when the flange is formed. Similarly, a slight gap is formed between the flanges 50A and 52A or between the flanges 52A and 51A. Both flanges 50A, 52A or 52A, 51A are joined by a fastener 54 having a round hole 55, and the round hole 55 is closed by a tape 56 having good air permeability. The eyes 36A and 36B have a structure provided with an opening 37 through which water vapor can pass.

The operation of this embodiment is as follows.
While the cooling storage is in operation, the outside is in a high temperature and high humidity state, whereas the inside is in a low temperature and low humidity state. Here, when the partial pressure difference of the water vapor generated inside and outside the chamber is large, the water vapor outside the chamber tries to move toward the inside through the heat insulating box 30, but after the heat insulating material 33 is filled with foam, Since the joints 35A and 35B between the panels in the outer box 31 are closed by the sealing material 44 having a low water vapor transmission rate, the entry of water vapor from the joints 35A and 35B of the outer box 31 is prevented. Therefore, it is possible to suppress the water vapor from staying in the heat insulating material 33 and, consequently, the condensation and icing thereof.

However, although the joints 35A and 35B of the outer box 31 are closed with the sealing material 44 having a low water vapor transmission rate, the seams may not completely close and water vapor may enter the heat insulating material 33 unexpectedly. Further, there is a possibility that air (water vapor) stays in the heat insulating material 33 when the heat insulating material 33 is filled with foam.
However, in this embodiment, since the openings 37 are provided in the joints 36A and 36B of the inner box 32, even if the water vapor enters or stays in the heat insulating material 33 as described above, It moves to the inside through the opening 37 of the inner box 32 and the water vapor is continuously retained in the heat insulating material 33, and therefore, condensation and icing are suppressed.

On the other hand, due to a pressure difference mainly generated inside and outside the chamber, a gap between the drain pipe 29 (see FIG. 2) provided in the drain pan 28 of the defrosted water or the packing 64 (see FIG. 5) attached to the heat insulating door 60, etc. Passing through, the air outside the warehouse enters the warehouse, and the openings 37 are provided in the joints 36A and 36B of the inner box 32 as described above. Therefore, the heat insulating material 33 passes through the openings 37. There is a risk of intrusion. However, since the air enters the heat insulating material 33 in a low-temperature and low-humidity state in the cabinet, no condensation occurs.
For example, when the defrosting operation is performed, the inside of the cooler chamber 12 is in a high temperature / high humidity state. At this time, the internal fan 25 is stopped and high temperature / high humidity air is stored. Inflow into the chamber 11 is suppressed as much as possible, and the air directly flows out of the chamber through the drainage pipe 29 and the like. Therefore, even if the joints 36A and 36B of the inner box 32 have the opening 37, High temperature and high humidity air can be prevented from entering the heat insulating material 33.

As described above, according to the present embodiment, the joints 35A and 35B between the panels in the outer box 31 are closed by the sealing material 44 having a low water vapor transmission rate, and therefore, from the joints 35A and 35B of the outer box 31. The water vapor is prevented from entering the heat insulating material 33, and even if it enters, the water vapor moves from the openings 37 provided in the joints 36A and 36B of the inner box 32 into the cabinet. As a result, it is possible to suppress the water vapor from staying in the heat insulating material 33, and thus to prevent condensation and icing, and to prevent the performance deterioration of the heat insulating material 33 over a long period of time.
When comparing the cooling storage according to the present embodiment and the conventional cooling storage without taking the measures of the present embodiment, for example, the drop in cooling temperature in the storage and the drop in cooling rate are greatly reduced. Has been confirmed.
Further, when the openings 37 are provided in the joints 36A and 36B of the inner box 32, the fastener 54 has a structure in which a round hole 55 is opened. Up is also kept small.

<Embodiment 2>
FIG. 4 shows Embodiment 2 of the present invention. In the second embodiment, the structure of the portion where the opening 37 is provided in the joint 36A (36B) of the inner box 32 is improved.
That is, among the flange 50A of the top plate 50 and the flange 52A at the upper edge of the right side plate 52, the upper surface of the flange 52A of the right side plate 52 is embossed or the like as shown in FIG. A plurality of protrusions 58 are provided at appropriate intervals.

Then, as shown in FIG. 4A, both flanges 50A and 52A are overlapped with each other with the protrusion 58 interposed therebetween, and in the same manner as in the first embodiment, the flanges 50A and 52A are joined by a fastener 54 having a round hole 55 formed therein. The hole 55 is closed with a tape 56 having good air permeability. The lower seam 36B can have the same structure.
It is advantageous when the opening 37 is provided with a large opening in the joints 36A and 36B of the inner box 32. Further, by changing the height of the protrusion 58, the gap between the flanges 50A and 52A, and thus the opening can be reduced. Control is also easy.

<Embodiment 3>
Embodiment 3 of the present invention will be described with reference to FIG. This Embodiment 3 has illustrated the case where it applies to the heat insulation door 60. FIG.
The heat insulating door 60 has an outer plate 61 made of a stainless steel plate having a shallow dish shape opened on the back surface side, and an inner plate 62 made of ABS resin having a stepped shape in which the central portion bulges to the back surface side compared to the peripheral edge portion. And. A flange 61 </ b> A bent at a right angle inward is formed at the opening edge of the exterior plate 61. In addition, a packing mounting groove 65 is formed on the entire back surface of the peripheral edge of the interior plate 62 for mounting the magnet packing 64.

In manufacturing, the outer peripheral body of the present invention is formed by assembling the peripheral edge of the interior board 62 in close contact with the flange 61A of the exterior board 61 via the caulking material 66A. The interior plate 62 has a plurality of vent holes (not shown) that are large enough to prevent foam leakage. The outer shell body assembled as described above is set in a foaming jig, and liquid heat insulating material 33 (polyurethane foam) is injected from an inlet (not shown) opened at an appropriate location on the peripheral surface of the exterior plate 61. Is injected into the filling space between both plates 61 and 62, and this is foamed and solidified, so that the heat insulating material 33 is filled.
Thereafter, an opening 67 made of a round hole is formed at an appropriate position on the peripheral surface of the bulging portion 62A of the interior plate 62. Finally, the heat insulating door 60 is completed by fitting the magnet packing 64 into the packing mounting groove 65.

The heat insulating door 60 is attached to the entrance / exit 15 of the storage body 10, and when closed, the magnet packing 64 is attracted to the edge of the entrance / exit 15 to be sealed. In other words, when the heat insulating door 60 is closed, the outer plate 61 and the outer portion of the packing mounting groove 65 of the inner plate 62 face the outside of the cabinet, and the same portion becomes the outer member 68 of the present invention. On the other hand, the inner part of the interior plate 62 with respect to the packing mounting groove 65 faces the interior, so that this part becomes the interior member 69 of the present invention. Further, the seam 66 between the flange 61A of the exterior plate 61 and the peripheral edge of the interior plate 62 is a gap existing in the exterior member 68 in the present invention.
Therefore, in the heat insulating door 60 of the present embodiment, the joint 66 (gap) of the exterior member 68 is closed with a caulking material 66A having a low water vapor transmission rate, and the interior member 69 is provided with an opening 67 through which water vapor can pass. It has a structure.

When the water vapor partial pressure difference generated inside and outside the chamber is large, the water vapor outside the chamber tries to move toward the inside through the heat insulating door 60, but the seam 66 of the exterior member 68 is a caulking material having a low water vapor transmission rate. Since it is closed by 66A, the entry of water vapor from the joint 66 of the exterior member 68 is prevented. Therefore, it is possible to suppress the water vapor from staying in the heat insulating material 33 and, consequently, the condensation and icing thereof.
However, similarly, the seam 66 may not be completely closed, and water vapor may intrude into the heat insulating material 33 unexpectedly. Also, when the heat insulating material 33 is filled with foam, air (water vapor) ) May remain, but the interior member 69 is provided with an opening 67. Therefore, even if water vapor enters or stays in the heat insulating material 33, the water vapor passes through the opening 67. Therefore, it is possible to prevent the water vapor from continuing to stay in the heat insulating material 33, and condensing / freezing.
As a result, the performance deterioration of the heat insulating material 33 can be prevented over a long period of time.

<Embodiment 4>
A fourth embodiment of the present invention will be described with reference to FIGS. In this Embodiment 4, the case where the inside is applied to the horizontal type refrigerator-freezer divided into the freezer compartment and the refrigerator compartment is illustrated.
The overall structure of the horizontal refrigerator-freezer will be described focusing on the differences from the horizontal refrigerator shown in the first embodiment. In addition, about the site | part which has the same function as the horizontal refrigerator of Embodiment 1, the same code | symbol is attached | subjected suitably and description is abbreviate | omitted or simplified. A heat insulating front frame 90 is erected at the center of the front opening of the storage body 10, and a heat insulating partition member 100, which will be described later in detail, is retrofitted on the back side of the front frame 90, so The left side is a freezer compartment 11F, and the right side is a refrigerator compartment 11R. A swinging heat insulating door (not shown) is attached to the opening on the front surface of both chambers 11F and 11R so as to be opened and closed.

  In the cooler chamber 12 communicating with the freezer compartment 11F, a freezer cooler 24F and an internal fan 25F are provided, and a duct 91 is stretched on the surface of the partition member 100 on the refrigerator compartment 11R side. A refrigerator room 92 on the refrigeration side is formed, and a refrigerator 24R for refrigeration and an internal fan 25R are provided here. On the other hand, the cooling unit 20A is configured such that a refrigeration device including a compressor 21, a condenser 22 and the like is installed on a base so that it can be taken into and out of the machine room 16, and the discharge side of the compressor 21 is opened and closed individually. It connects to each cooler 24F and 24R side via the valve, and the refrigeration cycle of what is called 1 compressor-2 cooler is comprised. Basically, the refrigerant is supplied to the respective coolers 24F and 24R by opening the corresponding on-off valves, whereby the freezer compartment 11F and the refrigerator compartment 11R are cooled, and the freezer compartment 11F has a set temperature for freezing (for example, -30 ° C), the refrigerator compartment 11R is maintained at a higher refrigeration set temperature (for example, 3 ° C).

Next, the structure of the partition member 100 and the arrangement structure thereof will be described.
The partition member 100 includes a first panel 101 and a second panel 102 both made of stainless steel plates. The first panel 101 is arranged facing the refrigerating chamber 11R, and has front and back side edges of a rectangular main body plate 104 substantially equal to the longitudinal cross-sectional shape in the storage body 10, and in detail, upper and lower ends thereof. From the portion excluding the predetermined area, the side plate 105 is formed by being bent at a right angle toward the refrigerator compartment 11R side (the right side in FIG. 7), and the protruding ends of the side plates 105 are further bent at a right angle in a direction facing each other. A short lower plate 106 is bent at the lower edge of the main body plate 104, and the lower plate 106 is formed in a stepped shape with the protruding end side lowered one step.
At the four corners of the main body plate 104, mounting seats 109 for the screws 108 are recessed, and through holes 110 for the screws 108 are opened on the bottom surface of the mounting seats 109. Further, a quarter circular cutout 111 is formed in the upper corner of the main body plate 104.

The second panel 102 is arranged facing the freezer compartment 11F, and has a main body plate 113 having the same size as the main body plate 104 of the first panel 101. From the back side edge, a side plate 114 shorter than the back side plate 105 and the front side of the first panel 101 is bent at a right angle to the side opposite to the freezer compartment 11F side. A quarter circular notch 111 having the same size as that of the first panel 101 is formed at the upper upper corner of the main body plate 113, and the notch 111 is opened so that the upper side is open. The back portion of the side plate 114 and the upper portion of the back side plate 114 are cut away.
The flange 115 is bent at a right angle from the protruding edges of the front and back side plates 114 of the three side plates 114 in a direction opposite to each other, and from the protruding edge of the upper side plate 114, the flange 115 A slightly narrower flange 115A is formed by bending at a right angle downward. The front end portion of the upper flange 115A and the upper end of the front flange 115 are both cut at an angle of 45 degrees and abutted against each other.

As described later, the first panel 101 is overlapped on the second panel 102 with the upper edge of the main body plate 104 and the front and back side edges of the main body plate 104 being placed on the upper side and the front and back flanges 115A and 115. In the front and back flanges 115 of the second panel 102, screw holes 117 are cut at positions aligned with the insertion holes 110 of the screws 108 formed at the four corners of the main body plate 104 of the first panel 101.
A plurality of opening portions 119 each having a horizontally long rectangle are formed side by side at a predetermined pitch in a position near the front and back edges of the main body plate 113 of the second panel 102. These openings 119 also serve as mounting holes for the shelf receivers that receive the shelves, and are thus formed at the same pitch as the mounting holes for the shelf receivers arranged in the shelf columns 94 (see FIG. 6). .
In addition, an injection port 120 formed of a round hole is formed at a substantially central portion in the length direction of the side plate 114 on the upper side of the second panel 102.

The partition member 100 is manufactured as follows. Three spacers 122 in the form of a block made of polystyrene foam are provided, and the spacers 122 are flanges 115A at three corners of the front side lower end portion and the rear side upper and lower end portions of the main body plate 113 of the second panel 102. , 115 is closely placed on the back side. At the same time, a sponge tape 124 having good air permeability is attached to the surfaces of the three flanges 115A and 115 over the entire length.
From such a state, the upper edge of the main body plate 104 of the first panel 101 and the front and back side edges are applied to the corresponding flanges 115A and 115 of the second panel 102, that is, the sponge tape 124 affixed to the surface thereof. The screws 108 are passed through the insertion holes 110 which are stacked and opened in the mounting seats 109 at the four corners of the main body plate 104 of the first panel 101, and are screwed into the other screw holes 117 cut through the flange 115 while passing through the sponge tape 124. Tighten together. In other words, a seam 125 formed by the peripheral edge of the main body plate 104 of the first panel 101 and the flanges 115A and 115 is formed at the three peripheral edges of the upper edge and the front and back side edges, and the seam 125 has air permeability. A good sponge tape 124 is sandwiched.
As a result, the outer shell body 126 is assembled, but the opening on the lower surface of the outer shell body 126 is closed by a sealing material 127 having a low water vapor transmission rate (for example, a carton tape made of polypropylene).

Such an outer shell body 126 is set in a foaming jig, and at least the lower surface of the outer shell body 126 to which the sealing material 127 is attached is applied to the jig, and the main body of the first and second panels 101 and 102 Almost the entire surfaces of the plates 104 and 113 are sandwiched from both sides by the clamping unit. In this state, the liquid heat insulating material 103 (polyurethane foam) is injected into the filling space in the outer shell 126 (between both panels 101 and 102) from the inlet 120 of the upper side plate 114, and this foams and solidifies. Thus, the heat insulating material 103 is filled. The degassing at the time of foaming is performed through a sponge tape 124 disposed at a joint 125 between the peripheral edge of the main body plate 104 of the first panel 101 and the flanges 115A and 115 of the second panel 102.
When the foam filling of the heat insulating material 103 is completed in this way, after being taken out from the foaming jig, the sealing material 128 having the same low water vapor transmission rate as that described above is formed on the outer surface side of the joint 125 where the sponge tape 124 is interposed. Is pasted and closed. Further, the inlet 120 of the liquid heat insulating material 103 is also closed with a sealing material 129 having a low water vapor transmission rate. Further, a synthetic resin plate 123 is attached to the outer surface of the sealing material 127 that covers the lower surface of the outer shell 126. Thereby, manufacture of the heat insulation partition member 100 is completed.

The partition member 100 is attached as follows. First, a guide 96 made of synthetic resin in the form of a channel is formed on the ceiling surface in the storage body 10 on the back side of the left region as viewed from the front of the front frame 90, from the back surface of the front frame 90 to the inner wall of the interior. It is attached along the depth direction over a position slightly before. The partition member 100 is stood up after the upper end portion is fitted into the guide 96 in an oblique posture, and the front and back side plates 105 of the first panel 101 are respectively connected to the back surface of the front frame 90 and the back of the interior of the cabinet. It is fixed to the wall by screwing in two places at the top and bottom. Further, the lower plate 106 is screwed to, for example, three places with respect to the bottom wall in the cabinet.
When the partition member 100 is attached in this way, as described above, the cooler chamber 92 is formed by stretching the duct 91 on the right side of the first panel 101, and the cooler 24R and the internal fan are stored therein. 25R. In addition, the refrigerating apparatus and the cooler 24R are connected to each other by a refrigerant pipe by using a notch 111 provided at a corner at the upper back of the partition member 100.

The operation of this embodiment is as follows.
During operation of the refrigerator-freezer, the refrigerator compartment 11R is in a relatively high temperature and high humidity state, whereas the freezer room 11F is in a relatively low temperature and low humidity state. Here, when the pressure difference generated between the refrigerating room 11R and the freezing room 11F and the water vapor partial pressure difference are large, as shown by the arrow X in FIG. It penetrates into the freezer compartment 11F side through a gap between the front and back peripheral surfaces and the front frame 90 or the back wall in the cabinet. Accordingly, not only the first panel 101 side of the partition member 100 but also the peripheral surface of the partition member 100 can be said to be a surface substantially facing the refrigerating chamber 11R, and the seam 125 exists on the same surface. It becomes a gap.

Here, if the seam 125 on the peripheral surface of the partition member 100 is not sealed, a part of the water vapor passes through the sponge tape 124 interposed in the seam 125 in the heat insulating material 103 in the partition member 100. May invade.
In this respect, in this embodiment, the joint 125 in the partition member 100 is closed by the sealing material 128 having a low water vapor transmission rate, so that the entry of water vapor from the joint 125 itself is prevented. Therefore, it is possible to suppress the water vapor from staying in the heat insulating material 103 and, consequently, the condensation or icing thereof.

However, although the seam 125 is closed with the sealing material 128 having a low water vapor transmission rate, the seam 125 may not be completely closed, and water vapor may enter the heat insulating material 103 unexpectedly. Further, there is a possibility that air (water vapor) stays in the heat insulating material 103 when the heat insulating material 103 is filled with foam.
However, in this embodiment, since the openings 119 are provided along the front and back edges of the main body plate 113 of the second panel 102 of the partition member 100, water vapor enters the heat insulating material 103 as described above. Even if the water vapor stays or stays, the water vapor moves to the freezer compartment 11F through the opening 119 of the second panel 102, and the water vapor continues to stay in the heat insulating material 103, resulting in condensation or icing. It can be suppressed.
On the other hand, the opening 119 is provided in the second panel 102, which means that air (arrow X) moved from the refrigerator compartment 11 </ b> R to the freezer compartment 11 </ b> F enters the heat insulating material 103 through the opening 119. However, since the air enters the heat insulating material 103 in a low temperature and low humidity state when it moves into the freezer compartment 11F, it does not cause condensation.

As described above, according to the present embodiment, the joint 125 provided on the peripheral surface of the partition member 100 that is substantially the surface facing the refrigerating chamber 11R is closed by the sealing material 128 having a low water vapor transmission rate. Therefore, water vapor is prevented from entering the heat insulating material 103 from the joint 125, and even if the water vapor enters, it is provided on the second panel 102 constituting the surface of the partition member 100 facing the freezer compartment 11F side. It moves from the opened opening 119 to the freezer compartment 11F side. As a result, it is possible to prevent water vapor from staying in the heat insulating material 103, and thus to prevent condensation and icing, and to prevent performance deterioration of the heat insulating material 103 over a long period of time. As a result, the predetermined cooling performance can be maintained over a long period of time.
In addition, the openings 119 formed in tandem on the front side and the back side of the second panel 102 also serve as mounting holes for the shelf receivers for receiving the shelves, so that the right side as viewed from the front in the freezer compartment 11F. It is possible to eliminate the need for two shelf pillars that should be arranged in front and back, and to reduce the cost accordingly.

<Embodiment 5>
FIG. 9 shows Embodiment 5 of the present invention. In the fifth embodiment, a vertical refrigerator-freezer is illustrated.
The schematic structure of the vertical refrigerator-freezer is as follows. The vertically long heat insulation box 130 having a front opening serving as a storage body is vertically divided by a heat insulating partition member 131, the upper side being a freezer compartment 132F and the lower side being a refrigerator compartment 132R. ing. Characteristically, the partition member 131 is formed integrally with the heat insulating box 130.
More specifically, the front opening formed by joining a plurality of panels made of stainless steel plates in the vertically long outer box 134 of the front opening formed by joining a plurality of panels made of galvanized steel plates. The two inner boxes 135F and 135R having a short height are accommodated with a space between the inner box 135F and 135R, and the upper inner box Joiners between the opening edges of the lower surface of 135F and the upper surface of the lower inner box 135R, and between the other opening edges of the inner boxes 135F and 135R and the corresponding opening edges of the outer box 134, respectively. The outer shell 137 is formed by mounting 136.

Here, the joints 139 of the inner boxes 135F and 135R are respectively set at two places on the upper and lower sides, and the flanges are overlapped and joined by rivets. Similarly, the seam 140 of the outer box 134 is also located at two places on the upper and lower sides, and the flanges are overlapped and joined with rivets, but the lower seam 140B has an inner side to prevent the heat insulating material 138 from leaking. A sealing material 142 having a low water vapor transmission rate such as a paper tape is affixed. On the other hand, in the upper joint 140A, a sponge tape 143, which is a highly breathable sealing material, is sandwiched in order to degas the foaming. .
The outer shell 137 having such a structure is set in a foaming jig, and a liquid heat insulating material 138 (polyurethane foam) is supplied to the outer box from an inlet (not shown) opened at an appropriate position of the outer box 134. It is injected into the filling space between 134 and the inner boxes 135F and 135R, and this is foamed and solidified, so that the heat insulating material 138 is filled, and the heat insulating box 130 and the partition member 131 are integrally formed. The degassing at the time of foaming is performed mainly through the sponge tape 143 disposed on the joint 140A on the upper side of the outer box 134.

The above is the partition member-integrated heat insulating box 130 according to the conventional structure. However, the heat insulating box 130 has the following problems.
First, regarding the seam 139 of the inner box 135, although the flanges are appropriately riveted and are riveted, by receiving the foaming pressure at the time of foaming of the heat insulating material 138, the level is not a problem as a product. There is, however, a slight gap between the flanges that are overlapped, or a slight gap between the flanges that are also formed by a slight deformation such as undulation during molding of the flange. There are circumstances.

During operation of the refrigerator-freezer, the refrigerator compartment 132R is in a relatively high temperature / humidity state, whereas the refrigerator room 132F is in a relatively low temperature / humidity state, where the refrigerator compartment 132R and the freezer compartment When the difference in atmospheric pressure and the partial pressure difference of water vapor generated with respect to 132F is large, the water vapor on the refrigerating chamber 132R side is, for example, the upper seam 139C in the lower inner box 135R, in other words, the refrigerating chamber 132R in the partition member 131. Enters the seam 139C on the opposite surface, penetrates the filled heat insulating material 138 and attempts to move to the freezer compartment 132F side. At this time, a part of the water vapor stays in the heat insulating material 138, and when the temperature is lower than the dew point temperature, there is a possibility that condensation or icing may occur and the performance of the heat insulating material 138 may be deteriorated.
In addition, when the pressure difference or the water vapor partial pressure difference between the inside and outside of the chamber is large, the water vapor outside the chamber penetrates through the sponge tape 143 of the joint 140A on the upper side of the outer box 134 and penetrates the heat insulating material 138. Similarly, there was a problem that a part of the water vapor stayed in the heat insulating material 138 and moved to the freezer compartment 132F side, and dew condensation or icing occurred when the temperature was lower than the dew point temperature.

Therefore, in the present embodiment, before the outer shell 137 is assembled, the upper joint 139C in the lower inner box 135R constituting the refrigerating chamber 132R has a sealing material 145 having a low water vapor transmission rate across both flanges (for example, A carton tape made of polypropylene) is stuck on. On the other hand, the lower seam 139B in the upper inner box 135F constituting the freezer compartment 132F is left unsealed, and as a result, the seam 139B is the opening of the present invention. .
Further, after the heat insulation box 130 is manufactured, a sealing material 146 having a low water vapor transmission rate is attached to the outer surface side of the upper joint 140A in which the sponge tape 143 of the outer box 134 is interposed. Closed. Note that the upper joint 139A of the upper inner box 135F and the lower joint 139D of the lower inner box 135R are also not sealed.

The operation and effects of this embodiment are as follows.
During operation of the refrigerator-freezer, the refrigerator compartment 132R is in a relatively high temperature / humidity state, whereas the refrigerator room 132F is in a relatively low temperature / humidity state, and between the refrigerator compartment 132R and the freezer compartment 132F. 9 is large, the water vapor in the refrigerating chamber 132R is generated from the seam 139C on the surface of the partition member 131 facing the refrigerating chamber 132R, as indicated by the arrow Y in FIG. Although it tries to penetrate into the heat insulating material 138, since the joint 139C is closed by the sealing material 145 having a low water vapor transmission rate, the water itself is prevented from entering from the joint 139C. Therefore, it is possible to suppress the water vapor from staying in the heat insulating material 138 and, consequently, the condensation and icing thereof.

However, although the seam 139C is closed with the sealing material 145 having a low water vapor transmission rate, the seam 139C may not completely close, and water vapor may intrude into the heat insulating material 138 unexpectedly. In addition, air (water vapor) may stay in the heat insulating material 138 when the heat insulating material 138 is filled with foam.
In this embodiment, the lower seam 139B of the upper inner box 135F constituting the freezer compartment 132F, that is, the surface of the partition member 131 that faces the freezer compartment 132F is positioned substantially opposite to the seam 139C. Since there is an eye 139B and this functions as an opening, even if water vapor enters or stays in the heat insulating material 138 as described above, the water vapor passes through the seam 139B serving as the opening and is in the freezer compartment 132F. It is possible to prevent the water vapor from continuing to stay in the heat insulating material 138, and thus dew condensation and icing.
Here, in order to positively form an opening in the joint 139B of the partition member 131 facing the freezer compartment 132F, for example, as shown in FIG. You may make it form a protrusion in the flange of one side at intervals.

  On the other hand, the seam 139B serving as an opening is provided on the surface of the partition member 131 facing the freezer compartment 132F. This means that the air that has entered the freezer compartment 132F from the refrigerator compartment 132R due to leakage or the like is the same seam 139B. There is a concern that the air enters the heat insulating material 138 through the air, but when the air enters the freezer compartment 132F, the air enters the heat insulating material 138 in a low temperature and low humidity state. Is not reached.

During operation of the cooling storage, the outside of the storage is in a high temperature and high humidity state, whereas the inside of the storage is in a low temperature and low humidity state. Here, when the difference in the partial pressure of water vapor generated inside and outside the chamber is large, the water vapor outside the chamber tends to move from the seam 140 </ b> A on the upper side of the outer box 134 interposing the sponge tape 143 toward the interior. However, since the joint 140A is closed with the sealing material 146 having a low water vapor transmission rate, the entry of water vapor from the joint 140A itself is prevented.
However, although the seam 140A on the upper side and the seam 140B on the lower side of the outer box 134 are closed with the sealing materials 146 and 142 having a low water vapor transmission rate, they are not completely closed, and the water vapor is unexpectedly generated. There is a possibility that air (water vapor) may enter into the heat insulating material 138 or stay in the heat insulating material 138 when the heat insulating material 138 is foam-filled. Since there are seams 139A and 139D of the boxes 135F and 135R and the opening is secured, even if water vapor enters or stays in the heat insulating material 138 as described above, the water vapor becomes an opening. It moves to the inside through the joints 139A and 139D of the inner boxes 135F and 135R, and water vapor is continuously retained in the heat insulating material 138, thereby preventing condensation and icing. It is.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the first and second embodiments, the fastener may be made to have air permeability by adopting a porous structure such as sintered molding resin or foamed resin.
(2) In Embodiments 1 and 2, the gap that can be formed on the exterior member side is not limited to the joint of the panels. For example, when the drain pipe is provided on the bottom surface of the heat insulating box, the gap that can be provided at the protruding position of the drain pipe Etc. are also included. Therefore, the outer box is not limited to one in which a plurality of panels are connected, but includes one integrally formed with a metal plate.

(3) In the first to third embodiments, the entry of water vapor can be completely prevented by closing the gaps such as the joints of the exterior members with a sealing material having a low water vapor transmission rate, depending on the installation position and usage conditions of the cooling storage. However, in the case where it can be suppressed only slightly, it is not necessary to provide an opening on the interior member side, and such a thing is also included in the technical scope of the present invention.
(4) In the horizontal refrigerator-freezer illustrated in the fourth embodiment, the partition member is integrally formed with the heat insulating box. Conversely, in the vertical refrigerator-freezer illustrated in the fifth embodiment, the partition member is separate from the heat insulating box. The present invention can be similarly applied to the formed one.
(5) The present invention is not limited to the refrigerator and refrigerator-freezer exemplified in the above embodiment, in summary, a cooling refrigerator in which the inside is maintained in a lower temperature atmosphere than the outside, and further a storage room having a different cooling temperature in the inside. It can be widely applied to all of the heat insulating structures such as the heat insulating box, the heat insulating door, and the heat insulating partition member used in the cooling storage compartments divided into two.

1 is an external perspective view of a cooling storage according to Embodiment 1 of the present invention. Sectional view showing its internal structure Partial sectional view of heat insulation box (A) Sectional drawing which shows the structure of the joint of the inner box which concerns on Embodiment 2, (B) The perspective view which shows one flange which comprises the joint The fragmentary sectional view of the heat insulation door concerning Embodiment 3 Sectional drawing which shows the internal structure of the cooling storehouse which concerns on Embodiment 4. Plan sectional view showing the arrangement structure of the partition member Exploded perspective view of partition member Partial cutaway longitudinal sectional view of a cooling storage according to Embodiment 5 Cross section of conventional example

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Storage body 11F ... Freezer room 11R ... Refrigeration room 12 ... Cooler room 30 ... Heat insulation box 31 ... Outer box (exterior member) 32 ... Inner box (interior member) 33 ... Heat insulation material 35A, 35B ... (Outer box 31 Side seam 36A, 36B ... (inner box 32 side) seam 37 ... opening 40, 41, 42 ... (outer box 31 side) panel (plate material) 40A, 41A, 42A ... flange 44 ... (water vapor) Sealing material 50, 51, 52 (panel side) 50A, 51A, 52A ... Flange 54 ... Fastener 55 ... Round hole 56 ... (Good air permeability) Tape 58 ... Projection Numeral 60: Insulating door 61 ... Exterior plate 62 ... Interior plate 64 ... Magnet packing 65 ... Packing mounting groove (packing mounting portion) 66 ... Joint 66A ... Caulking material (with low water vapor transmission rate) 67 ... opening 68 ... exterior member 69 ... interior member 100 ... partition member 103 ... heat insulating material 119 ... opening 125 ... joint 126 ... outer shell 128 ... (low water vapor permeability) sealing material 130 ... Insulation box 131 ... Partition member 132F ... Freezer compartment 132R ... Refrigeration compartment 137 ... Outer shell 139B ... Joint (opening) 138 ... Insulation 139C ... Joint 145 ... (Steam permeability is low)

Claims (8)

In the heat insulating structure of the cooling storage box, which is formed by foaming and filling the outer shell with a heat insulating material made of foamed resin, and interposed between two spaces having different temperature ranges,
A heat insulating structure for a cooling storage, wherein a gap existing on a surface of the outer shell facing a relatively high temperature space is closed with a sealing material having a low water vapor transmission rate. The heat insulation structure for a cooling storage according to claim 1, wherein an opening is provided in a surface of the outer shell facing the relatively low temperature space. The surface on the side facing the relatively low-temperature space is formed by joining a plurality of plate materials, and the opening is formed by a gap formed between the facing surfaces of the two plate materials facing each other. The heat insulation structure for a cooling storage according to claim 2. 4. The cooling storage according to claim 3, wherein a protrusion is formed on one of the mating surfaces facing each other, and the protrusion is abutted against the other mating surface so that the mating surfaces are connected to each other. Thermal insulation structure. The heat insulating structure is formed by filling the heat insulating material with foam in an outer shell body in which an exterior member facing the outside and an interior member facing the inside are arranged at an interval, The exterior member constitutes the surface on the side facing the relatively hot space of the outer shell body, and the interior member constitutes the surface on the side facing the relatively cool space of the outer shell body. The heat insulating structure for a cooling storage according to claim 1, wherein: The heat insulating structure is a heat insulating box formed by arranging an outer box and an inner box at an interval, and the foam is filled with the heat insulating material between the two boxes. 6. The heat insulating structure for a cooling storage according to claim 5, wherein the inner box constitutes the interior member. The heat insulating structure is a heat insulating door formed by connecting an exterior plate and an interior plate provided with a packing mounting portion at a peripheral edge with a space therebetween, and the heat insulating material is foam-filled between both plates, The exterior member and the interior plate are configured by the outer portion of the packing mounting portion of the exterior plate and the interior plate, and the interior member by the inner portion of the packing mounting portion of the interior plate. The heat insulation structure of the cooling storehouse according to claim 5, wherein the joint line is a portion constituting a gap in the exterior member. The heat insulating structure is a partition member in which the heat insulating material is foam-filled in an outer shell body, and the storage chamber has different cooling temperature ranges on both sides sandwiching the partition member by mounting in the heat insulating box body The heat insulation structure for a cooling storage according to claim 1, wherein the structure is formed.

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